Automatic stop mechanism for winding machines



April 1931. w. J. OCONNOR AUTdMATIC STOP MECHANISM FOR WINDI NG MACHINES Filed Dec. 5, 1929 Patented Apr. 14, 1931 wxrmm a. ocoNNon. or nuwnsmx ir. new newsman AUTOMATIC STOI MECHANISM FOR WINDING MAUKINES Application filed. December 5, 1929. Serial No. 411,817.

This invention relates to a machine for winding material such as thread or yarn on a core, such as a spool or a bobbin, the core being rotated on its axis to accumulate the I material in the form of a circular mass or winding on the core.

The object of the invention is to provide a winding mechanism having simple, durable and effective means operable by the wound mass when the latter acquires a predetermined diameter and yardage, to stop the rotation of the core and hold it at rest, for the removal of the core and its charge from the machine.

Of the accompanying drawings forming a part of this specification,+

Figure 1 shows in perspective an embodiment of my invention associated with elements of a well known winding machine.

90 Figure 2 is a section in the plane indicated by the line 2--=-2 of Figure Figure 3 is a view similar to Figure. 2, showing the machine conditioned to stop the winding operation.

Figure 4 shows in perspective one of the elements of the improved automatic mechanism.

Figuree is a side view of the other ele ment of the automatic mechanism.

Figure 6 is a longitudinal sectional view, showing a core, a winding thereon, and the hereinafter described driven element attachcd to the core. i t

Figure? is a perspective view, showing a different embodiment of the automatic mechanism.- 1

Figure 8 is a section on the line indicated by 8-8 in Figure 7. I

. The same reference characters indicate the same parts in all of the figures.

Figures 1,2 and 3 show a winding mechanism adapted to wind a single core, It will be understood that the winding mechanism shown may be a unit of a machine which may include a plurality of said mechanisms. The said machine or unit includes a frame 12, which may be of any suitable construction,

whereby it is adapted to support the parts c0 hereinafter described. The representation with heads 24, between which the winding of the frame may be considered as conventional.

The machine includes a friction drive composed of a driving element, and, a driven element attachable to a core 14 (Figure 6). The to driving element is composed of a shaft 15, journaled in bearings 16 fixed to the frame, and friction wheels 17 fixed to the shaft, The driven element, attachable to the core 14, is composed of a cylindrical rod 18, insorted in an axial bore in the core 14;, and friction pulleys 19 and 20 fixed to the rod, and clamped againstthe ends of the core, so that the red, the pulleys, and the core are adapted to rotate as a single part. The pulley 19 is immovably fixedto the rod18, and the pulley 20 is provided with anintcrnall threaded bushing 21 (Figure 6) engagedwit a threaded portion ofthe rodand removable therefrom, to permit the removal of the core when a winding 22 hasbeen com leted there on, the operation of screwing t e pulley 20 on to the rod causing the clamping of. the

corebetweenthe pulleys 19 and 20, The ends of the rod 18 project from the pulleys and constitute trunnions which are removably inserted in open bearings 23 fixed to the frame. The end of the rod shown at the right in Figure 6 as projecting from the threaded portion of the rod to form a s runnion, should be of slightly smaller diameter than said threaded portion to permit the re moval of the core and the driven pulleys.

Thecore 14 is in this instance, provided 22 is formed.

The arrangement is such that during the winding operation the pulleys 19 and 20 bear .on upper portions of the wheels 17, and the rotation of the driving element causes the rotation of the driven element and the core attached thereto, thus causing a winding to be formed on the core, Ina machine which includes a plurality of winding units, the shaft 16 is usually elongated and. provided with a plurality of pairs offriction wheels 17 The construction thus far described is well known and in common use.

The mechanism is characterized by the aut matic mechanism next described, o erable drivenpulleys 19' and 20 to stop the winding operation, and maintain the wound core at rest and 1n condition for removal from the machine.

ment shown by'Figures 1 to 6, comprises a hired upwardly facing track including two spaced apart track members 26, formed on arms 27 of a substantially U-shaped bracket having means such as a shank 28 and bolts cooperating therewith for engagement in a predetermined position with the frame*12,'

anda cylindrical shiftable lifting pulley 29, having trunnions 30 inrolling contact and tractional engagement with the track members 26; Atone end of the track is a stop including two members 31. "At the opposite end'of the track is-another stop including two members 32, said members 31 and 32 being formed on the bracket, as best shown by Figure 4. During'the winding operation the trunnions 30 normally abut the stop members 31, and arrest'the liftingpulley in a starting position'as shown by Figures 1 and 2.

The arrangement is such that ,when'the core winding 22 is completed or acquires a predetermined diameter indicated by the dotted circle in Figure 2', andthe full line members 32, by downward pressure'ofthe thread winding 22 upon it, until an attendant removes the winding. 3 i

"The downward pressure of the completed thread winding on the lifting pulley 29 causes a suflicient tractional engagement between the trunnions 30 and the track'mem- 'bers 26, to cause the described movement of the lifting pulley on thetrack. Endwise displacement of the lifting pulley is prevented by the arms 27,011 which the track members 26 are formed, the ends of the pulley being in close proximity to" said arms and track members.

In the embodiment shown by Figures 7 and'8, the trunnions of the lifting pulley 29 are omitted, andjsaid pulley rests on and .frictionally engages an upwardly facing track composed of a single member 35, provided at one endwith a stop 36, and at its oppositeend with a stop 37. Ears 38 are provided between the stops toprevent endwise displacement of the pulley. The shank ant. Y circle in Figure 3,'the periphery of the wind- 28 may be formed on the stop 37. The track member 35 may be the body portion of a" metal plate from which the stops 36 and 37, and the cars 38 are bent upward. The downward pressure of the completed thread winding on the lifting pulle 29 causes a sufiicient tractional engagement etween theperiphery of said pulley and the single track member 7 35, to cause the described movement of the Said mechanism in the preferred embodi-V pulley on thetrack.

cated in a predetermined positionbelow the driven elementjof the winding machine, a

lifting pulley supported by the track and movable thereon by traction when rotated, and fixed spaced apart stops at oppositeends of the track, one stop'being adapted to cooperate with the trackinsupportingvthe pulley in a starting position under the driven f element and a winding '22thereon', tofcause the completed winding .to contact'with: and

rotate the pulley 29,and thereby cause it to move on the'tracktothe otherstop, and at the same time, raise the driven to stop the winding operation. i

f In each'embodiment' one of the stops .is adapted to cooperate with the track, thepulley, the raised driving element and the wlnding 22' thereon, to-maintain the pulley in its 9 raised position until the completed winding is removed from the machine by the: attend- It will be seen thatmy improved automatic mechanism is extremelysimple and is embodiedoin twoparts, one including an upwardly facing track having means forienelement gagement in a predetermined position with the frame 12. The lifting-pulley, constitut ing theother part of the' stop motion, may be operatively installed by simply placing it loosely on the'track, A i

When the lifting pulley is'in its shifted position, shown by Figure 3, and by dotted lines in Figure 8, itiscaused to remain in said position by the contact of the winding 22 with its periphery, andwhenthe driven element and the wound core are removedbyan attendant from the machine, the lifting'pulleyis free to i return I to its 2 starting position shown by Figures 1, 2 and 7 and by full lines in'Figure 8. I prefer toincline'the tracks as shown by. the drawings, so that the. stop which arrests the lifting pulley in its shifted position, is higherthan the other stop, inclination causes thevpulley to return automatically'to its starting. position when the winding 22 is removed] 1. A friction drive winding machine of the character stated, comprising driving friction wheels, driYen friction pulleys carrying the core of a thread winding and separable from the driving wheels to stop the'rotation of the core, the machine being characits terized by a stop mechanism including a fixed upwardly facing track, a core-lifting pulley supported by and movable by traction on the track with its periphery spaced from an incomplete thread winding on the core, and in position to be frictionally engaged and rotated by the periphery of a completed winding, the arrangement being such that the lifting pulley is shifted on the track by a completed winding and caused to separate the driven pulleys from the driving wheels, a fixed stop at one end of the track adapted to arrest thelifting pulley in a starting position, and a fixed stop at the opposite end of the track adapted to arrest said pulley in its shifted position.

2. A friction drive winding machine as specified by claim 1, the track being inclined to cause the lifting pulley to automatically return to its starting position when the raised thread winding is removed.

3. A friction drive winding machine as specified by claim 1, the track being provided with means for preventing endwise displacement of the lifting pulley.

4. A friction drive winding machine as specified by claim 1, the track being composed of two spaced apart track members, and the lifting pulley being provided With trunnions in tractional engagement with the track members, the ends of the lifting pulley being in close proximity to the inner sides of the track members, so that endwise displacement of said pulley is prevented.

In testimony whereof I have afiixed my signature.

WVILLIAM J. OCONNOR. 

